Storage stable polyisocyanates characterized by allophanate...

Details Storage stable polyisocyanates characterized by allophanate... Storage stable polyisocyanates characterized by allophanate...

C - Chemistry, Metallurgy

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C08G 18/80 (2006.01) C07C 273/18 (2006.01) C08G 18/78 (2006.01) C07C 275/60 (2006.01)

Patent

CA 1319208

2465 STORAGE STABLE POLYISOCYANATES CHARACTERIZED BY ALLOPHANATE LINKAGES Abstract of the Disclosure Organic polyisocyanates characterized by allopho- nate linkages are prepared by reacting an organic polyisocy- anate with a mono- or polyhydric compound in the presence of an organo metal catalyst. The catalyst is then deactivated using a compound such as an inorganic acid, organic acid, organic chloroformate or an organic acid chloride. The isocyanates are useful in preparing polyurethane foams.

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